Nebivolol, but not metoprolol, lowers blood pressure in nitric oxide-sensitive human hypertension.
Okamoto LE, Gamboa A, Shibao CA, Arnold AC, Choi L, Black BK, Raj SR, Robertson D, Biaggioni I. Nebivolol, but not metoprolol, lowers blood pressure in nitric oxide-sensitive human hypertension. Hypertension. 2014 Dec; 64(6):1241-7.